CN101545894B - Humidity indicator and preparation method thereof - Google Patents
Humidity indicator and preparation method thereof Download PDFInfo
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- CN101545894B CN101545894B CN2009100391165A CN200910039116A CN101545894B CN 101545894 B CN101545894 B CN 101545894B CN 2009100391165 A CN2009100391165 A CN 2009100391165A CN 200910039116 A CN200910039116 A CN 200910039116A CN 101545894 B CN101545894 B CN 101545894B
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Abstract
The invention provides a humidity indicator which comprises carrier and solution dipping the carrier, the solution contains the following components according to the weight percent: 30-97.5 of water, 2-40 of cobalt salt and 0.5-30 of bromine salt, wherein the cobalt salt is cobalt sulfate heptahydrate and/or cabaltous nitrate hexahydrate. The humidity indicator contains no cobalt chloride and copper salt but can show the indication effect of the common humidity indicator, is blue in the drying state and pink in the wet state and has high sensitivity. The invention also provides a preparation method of the humidity indicator.
Description
Technical field
The present invention relates to a kind of humidity indicator and preparation method thereof, be specifically related to a kind of humidity indicator that does not contain cobaltous dichloride and copper ion and preparation method thereof.
Background technology
At present, known humidity indicator all is to be smoked to the dissimilar carriers by the cobaltous dichloride solution impregnation of variable concentrations to form.Yet according to European Union environmental protection rules 67/548/CEE regulation, cobalt chloride has been listed in the second class carcinogen, thereby the use that is under an embargo.Therefore having occurred with the mantoquita is the humidity indicator of main active component, but contains a large amount of noxious material Cu because of it
2+, environment especially water environment and human body are all had huge risk and harm.And, the humidity indicator change color situation that with the mantoquita is main active component becomes the light blue or colourless of hygrometric state for the pale brown look from dry state, thereby the color distortion that the humidity variation causes is little, and sensitivity is not high, has limited its coml utilization to a great extent.
Therefore, need a kind of novel humidity indicator, it does not contain cobaltous dichloride and mantoquita, has high sensitivity simultaneously.
Summary of the invention
The objective of the invention is to overcome the defective of existing humidity indicator, a kind of humidity indicator that does not contain cobaltous dichloride and mantoquita is provided.
Another object of the present invention is to provide a kind of and can embody conventional humidity indicator indicating effect: dry state is for blue, and hygrometric state is a pink, and has highly sensitive humidity indicator.
Another object of the present invention is to provide the above-mentioned preparation method who does not contain the humidity indicator of cobaltous dichloride and mantoquita.
For achieving the above object, the solution that humidity indicator provided by the invention comprises carrier and soaks carrier, and soaks in solution by carrier and to make at dry support afterwards, described solution comprises following component and weight percentage: water 30～97.5%; Cobalt salt 2%～40%; Bromine salt 0.5%～30%, wherein said cobalt salt are Cobalt monosulfate heptahydrate and/or cabaltous nitrate hexahydrate.
In an embodiment of the invention, described bromine salt is alkali metal bromide, alkaline earth metal bromide.Preferably, described bromine salt is one or more the combination in lithium bromide, potassium bromide, sodium bromide, magnesium bromide, the calcium bromide.
In yet another embodiment of the present invention, described carrier is selected from fiber-like carrier, silica gel, molecular sieve, aluminium oxide and bentonitic clay.
In other embodiments of the present invention, can use six hydration cobaltous bromides replacement cobalt salt and bromine salt solute as solution, the quality percentage composition of six hydration cobaltous bromides is 2%～40%.
On the other hand, the invention provides the preparation method of above-mentioned humidity indicator, this method comprises by said ratio prepares described solution, and with carrier impregnation in described solution, the step of the described carrier of subsequent drying.
The humidity indicator that the present invention relates to does not contain cobaltous dichloride and mantoquita, environment and human body are safe from harm, and can embody conventional humidity indicator indicating effect: dry state is for blue, and hygrometric state is a pink, have high sensitivity, be fit to the detection of various ambient humidities.
Embodiment
Followingly according to specific embodiment the present invention is described in further detail, these embodiment only are exemplary certainly, are not limitation of the scope of the invention.
Embodiment 1: with the humidity indicator of water, Cobalt monosulfate heptahydrate and sodium bromide preparation indication different humidity environment, indication humidity and component concentration see Table 1.
Table 1
| Corresponding indication humidity | Water (g) | Cobalt monosulfate heptahydrate (g) | Sodium bromide (g) |
| 5％ | 97.5 | ?2 | 0.5 |
| 8％ | 95 | ?3 | 2 |
| 10％ | 90 | ?7 | 3 |
| 15％ | 80 | ?15 | 5 |
| 20％ | 70 | ?20 | 10 |
| 30％ | 60 | ?25 | 15 |
| 40％ | 50 | ?30 | 20 |
| 50％ | 40 | ?35 | 25 |
| 60％ | 30 | ?40 | 30 |
Embodiment 2: with the humidity indicator of water, cabaltous nitrate hexahydrate and magnesium bromide preparation indication different humidity environment, indication humidity and component concentration see Table 2.
Table 2
| Corresponding indication humidity | Water (g) | Cabaltous nitrate hexahydrate (g) | Magnesium bromide (g) |
| 5％ | 95.5 | ?3.5 | 1 |
| 8％ | 92 | ?6 | 2 |
| 10％ | 89 | ?8 | 3 |
| 15％ | 78 | ?15 | 7 |
| 20％ | 67 | ?19 | 14 |
| 30％ | 58 | ?22 | 16 |
| 40％ | 51 | ?28 | 21 |
| 50％ | 42 | ?33 | 25 |
| 60％ | 34 | ?38 | 28 |
Embodiment 3: with the humidity indicator of water, cabaltous nitrate hexahydrate, Cobalt monosulfate heptahydrate, sodium bromide and magnesium bromide preparation indication different humidity environment, indication humidity and component concentration see Table 3.
Table 3
Embodiment 4: the humidity indicator of Yi Shui, six hydration cobaltous bromides preparation indication different humidity environment, indication humidity and component concentration see Table 4.
Table 4
| Corresponding indication humidity | Water (g) | Six hydration cobaltous bromides (g) |
| 5％ | 95 | ?5 |
| 8％ | 93 | ?7 |
| 10％ | 90 | ?10 |
| 15％ | 87 | ?13 |
| 20％ | 85 | ?15 |
| 30％ | 80 | ?20 |
| 40％ | 75 | ?25 |
| 50％ | 70 | ?30 |
| 60％ | 62 | ?38 |
According to the humidity indicator that table 1 (with reference to specific embodiment 1) makes, the variable color situation is as shown in table 5 in different humidity environments.
Table 5
According to the humidity indicator that table 2 (with reference to specific embodiment 2) makes, the variable color situation is as shown in table 6 in different humidity environments.
Table 6
According to the humidity indicator that table 3 (with reference to specific embodiment 3) makes, the variable color situation is as shown in table 7 in different humidity environments.
Table 7
According to the humidity indicator that table 4 (with reference to specific embodiment 4) makes, the variable color situation is as shown in table 8 in different humidity environments.
Table 8
Respectively show data as can be seen by above, humidity indicator of the present invention is highly sensitive and the humidity indicating range is wide.Humidity indicator of the present invention does not contain cobaltous dichloride but can reach conventional humidity indicator indicating effect equally, and promptly dry state is blue, and hygrometric state is a pink, and has protected environment and human body to preserve from.
Though the present invention is described with reference to concrete embodiment, those skilled in the art can make conspicuous modification and modification to the present invention by after reading foregoing description, and without prejudice to the intent of the present invention and essence.The present invention comprises these modifications and modification within the scope of the claims intentionally.
Claims (4)
1. humidity indicator, it comprises carrier and the solution that soaks carrier, soaks afterwards dry support by carrier in solution again and makes, described solution comprises following component and weight percentage: water 30～97.5%; Cobalt salt 2%～40%; Bromine salt 0.5%～30%, wherein said cobalt salt are Cobalt monosulfate heptahydrate and/or cabaltous nitrate hexahydrate; Described bromine salt is alkali metal bromide, alkaline earth metal bromide; Described carrier is selected from fiber-like carrier, silica gel, molecular sieve, aluminium oxide and bentonitic clay.
2. humidity indicator as claimed in claim 1 is characterized in that, described bromine salt is one or more the combination in lithium bromide, potassium bromide, sodium bromide, magnesium bromide, the calcium bromide.
3. humidity indicator as claimed in claim 1 is characterized in that, uses six hydration cobaltous bromides replacement cobalt salt and the bromine salt solute as solution, and the quality percentage composition of six hydration cobaltous bromides is 2%～40%.
4. prepare the method for the described humidity indicator of claim 1, it comprises: prepare described solution by described component and weight percentage, and with carrier impregnation in described solution, the step of the described carrier of subsequent drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100391165A CN101545894B (en) | 2009-04-30 | 2009-04-30 | Humidity indicator and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100391165A CN101545894B (en) | 2009-04-30 | 2009-04-30 | Humidity indicator and preparation method thereof |
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| CN101545894A CN101545894A (en) | 2009-09-30 |
| CN101545894B true CN101545894B (en) | 2011-04-06 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102565054B (en) * | 2011-12-15 | 2013-04-03 | 湖北中信京华彩印股份有限公司 | Material capable of quickly changing color when wetted, preparation method for material and application of material |
| CN106198533B (en) * | 2016-08-17 | 2019-01-11 | 沈阳农业大学 | It is a kind of for detecting the humidity indicator and preparation method thereof of crop leaf humidity |
| CN109757250A (en) * | 2017-11-08 | 2019-05-17 | 丹阳润富农业技术有限公司 | A kind of flowerpot that humidity is visual |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86209663U (en) * | 1986-11-29 | 1987-10-31 | 潘国治 | Colour moisture meter |
| CN87206244U (en) * | 1987-04-09 | 1988-05-18 | 林基丛 | Temp.-measuring and moisture-sensible colour changing thermometer |
| CN1101425A (en) * | 1993-10-06 | 1995-04-12 | 中国科学院计算技术研究所 | Molecular chromatographic moisture meter |
-
2009
- 2009-04-30 CN CN2009100391165A patent/CN101545894B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86209663U (en) * | 1986-11-29 | 1987-10-31 | 潘国治 | Colour moisture meter |
| CN87206244U (en) * | 1987-04-09 | 1988-05-18 | 林基丛 | Temp.-measuring and moisture-sensible colour changing thermometer |
| CN1101425A (en) * | 1993-10-06 | 1995-04-12 | 中国科学院计算技术研究所 | Molecular chromatographic moisture meter |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2007-192614A 2007.08.02 |
| JP特开平10-253541A 1998.09.25 |
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Owner name: CLARIANT INTERNATIONAL LTD. Free format text: FORMER OWNER: YANG DECHENG Effective date: 20150821 Free format text: FORMER OWNER: VITAPAC VITAPAC ACTIVITY APPLIED MATERIALS CO., LTD. Effective date: 20150821 |
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Effective date of registration: 20150821 Address after: Mu Tengci, Switzerland Patentee after: CLARIANT INTERNATIONAL Ltd. Address before: 523290 Tang Hong Industrial Zone, Chong Hwan East Road, Shijie Town, Dongguan, Guangdong Patentee before: Yang Decheng Patentee before: Dongguan Weida Active Applied Materials Co.,Ltd. |
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Effective date of registration: 20230609 Address after: No. 18 Zhujing Road, Changshu Southeast Economic Development Zone, Suzhou City, Jiangsu Province Patentee after: JIANGSU SUD-CHEMIE PERFORMANCE PACKAGING MATERIALCO., Ltd. Address before: Swiss Mu Tengci Patentee before: CLARIANT INTERNATIONAL Ltd. |